TY - JOUR AU - Piriz, Gustavo AU - Banguero, Yolma A. AU - Pelaez, Arleth M. AU - Lema, Fernando J. AU - DeRosa, Alejandro AU - Quarneti, Aldo PY - 2022/09/11 Y2 - 2024/03/28 TI - Dwell time in the uterus and vagina as a parameter to analyze the dose distribution in cervix carcinoma for brachytherapy with Co-60 source. Clinical cases. JF - Revista Brasileira de Física Médica JA - Rev Bras Fis Med VL - 16 IS - SE - Artigo Original DO - 10.29384/rbfm.2022.v16.19849001597 UR - https://www.rbfm.org.br/rbfm/article/view/597 SP - 597 AB - <div class="page" title="Page 1"><div class="layoutArea"><div class="column"><p>Intracavitary gynecological brachytherapy uses as a guideline for dose distribution, the ratio between the pear length in the three directions of the axes considers at ICRU 38. The ratios h/w, h/t function as a parameter to find out how the uterus and vagina are covered by the prescription dose. This work correlates these ratios with the dwell times inside the uterus (tu) and vagina (tv) expecting to identify these times as criteria for the dose shape distribution. We performed an optimized treatment planning for 120 sessions of 6.0 Gy each, following the recommendations of the ABS, ICRU 38, and 89. The planning system used is HDRplus 3.0.4 with an HDR Eckert y Ziegler BEBIG Co0.A86 brachytherapy unit with Cobalt 60. Considering the tandem time modulation and the time differences between left and right irradiation in the vagina, the variation of the correlation with the number of sessions for the tu/tv ratio with h/w and h/t was studied. A correlation has been found between tu/tv with h/w and h/t, which depends on the amount of data. There is a good correlation between the tu/tv ratio with h/w and h/t respectively, which is stronger for the first one.</p></div></div></div> ER -